Render resistor color bands properly when zommed in

diylc/diylc-core/src/org/diylc/common/ObjectCache.java

@@ -43,6 +43,7 @@ public class ObjectCache {
   private ObjectCache() {}
 
   private Map<Float, Stroke> basicStrokeMap = new HashMap<Float, Stroke>();
+  private Map<Float, Stroke> zoomableStrokeMap = new HashMap<Float, Stroke>();
   private Map<String, Stroke> dashStrokeMap = new HashMap<String, Stroke>();
 
   public Stroke fetchBasicStroke(float width) {
@@ -53,6 +54,15 @@ public class ObjectCache {
     basicStrokeMap.put(width, stroke);
     return stroke;
   }
+  
+  public Stroke fetchZoomableStroke(float width) {
+    if (zoomableStrokeMap.containsKey(width)) {
+      return zoomableStrokeMap.get(width);
+    }
+    Stroke stroke = new ZoomableStroke(width, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
+    zoomableStrokeMap.put(width, stroke);
+    return stroke;
+  }
 
   public Stroke fetchStroke(float width, float[] dash, float phase) {
     String key = width + "|" + Arrays.toString(dash) + "|" + phase;

diylc/diylc-core/src/org/diylc/common/ZoomableStroke.java

@@ -0,0 +1,57 @@
+/*
+
+    DIY Layout Creator (DIYLC).
+    Copyright (c) 2009-2018 held jointly by the individual authors.
+
+    This file is part of DIYLC.
+
+    DIYLC is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    DIYLC is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DIYLC.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+package org.diylc.common;
+
+import java.awt.BasicStroke;
+
+/***
+ * {@link BasicStroke} that will always be zoomed in when rendered.
+ * 
+ * @author Branislav Stojkovic
+ */
+public class ZoomableStroke extends BasicStroke {
+
+  public ZoomableStroke() {
+    // TODO Auto-generated constructor stub
+  }
+
+  public ZoomableStroke(float width) {
+    super(width);
+    // TODO Auto-generated constructor stub
+  }
+
+  public ZoomableStroke(float width, int cap, int join) {
+    super(width, cap, join);
+    // TODO Auto-generated constructor stub
+  }
+
+  public ZoomableStroke(float width, int cap, int join, float miterlimit) {
+    super(width, cap, join, miterlimit);
+    // TODO Auto-generated constructor stub
+  }
+
+  public ZoomableStroke(float width, int cap, int join, float miterlimit, float[] dash, float dash_phase) {
+    super(width, cap, join, miterlimit, dash, dash_phase);
+    // TODO Auto-generated constructor stub
+  }
+
+}

diylc/diylc-core/src/org/diylc/presenter/G2DWrapper.java

@@ -55,6 +55,7 @@ import java.util.List;
 import java.util.Map;
 
 import org.diylc.common.ObjectCache;
+import org.diylc.common.ZoomableStroke;
 import org.diylc.core.IDrawingObserver;
 
 /**
@@ -406,7 +407,7 @@ class G2DWrapper extends Graphics2D implements IDrawingObserver {
     if (this.zoom > 1 && s instanceof BasicStroke) {
       BasicStroke bs = (BasicStroke) s;
       // make thin lines even thinner to compensate for zoom factor
-      if (bs.getLineWidth() <= 2)
+      if (bs.getLineWidth() <= 2 && !(s instanceof ZoomableStroke))
         s = ObjectCache.getInstance().fetchStroke((float) (bs.getLineWidth() / zoom), bs.getDashArray(), bs.getDashPhase());
     }
     canvasGraphics.setStroke(s);